[IPV4]: Trim the includes used in util.c

net/ipv4/utils.c

@@ -21,26 +21,8 @@
  *		2 of the License, or (at your option) any later version.
  */
 
-#include <asm/uaccess.h>
-#include <asm/system.h>
 #include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/errno.h>
-#include <linux/stat.h>
-#include <stdarg.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <net/ip.h>
-#include <net/protocol.h>
-#include <net/tcp.h>
-#include <linux/skbuff.h>
-
+#include <asm/byteorder.h>
 
 /*
  *	Convert an ASCII string to binary IP.